Originally these vans were used by the gentry wishing to take their horse-drawn carriages with them between their city and country residences. Covered Carriage Trucks (CCT) were a covered van for conveying those carriages and attarcted a higher charge than the basic open carriage truck (a flat wagon fitted for securing road vehicles). By 1948 the term General Utility Van (GUV) was applied to these vehicles as they could be loaded through the side or end doors, making them able to convey a wide range of loads, still including road vehicles. Railwaymen generally think of a GUV as the larger bogie vans being introduced when the new term was first being widely used, so 'CCT' remained in common use for the 4-wheeled vehicles.